A student is building a circuit which material should she use for the wires and why? A. A metalloid such germanium, because only some of its atoms have mobile electrons.
B. A nonmetal such as carbon, because its atoms have tightly bound electrons.
C. A noble gas such as krypton, because its atoms are far apart and it is nearly inert.
D. A metal such as copper, because its atoms have very mobile electrons.

Asteam is contained in a rigid tank with a volume of 1 m3. initially, the pressure and temperature are 7 bar and 500 oc, respectively. the temperature drops due to cooling process. determine: (1) the temperature at which condensation begins in °c, (2) the fraction of the total mass that has condensed when the pressure decreased to 0.5 bar. (3) the volume in m3 occupied by saturated liquid at the final state?